QUOTE(Rob Itagaki @ Jan 16 2011, 05:43)

You're talking about a country that has a word for men who grope women on trains. What do you think?
To be entirely fair, no there isn't (if you're thinking of the word "chikan[痴漢]," it only means molest). They are interestingly very demure when it comes to sex: we're talking about a country where the worst euphemism for penis is akin to the English "peepee". They are retardedly childish and shy when it comes to sex.
The whole hentai and AV sexuality that reaches us is more perverted, as it stems from a more perverted subculture: i.e.: one that has for the majority of their lives received rejection from women, and thus feels some anger towards women which can only seemingly be subsided through rape and grope fantasies. As far as I've been told by my friends who come from Japan, their normal porn is extremely vanilla. Judging them via hentai is akin to judging us via our badonkadonk sites and assume we're all obsessed with giant asses.
Lastly, the reason they say "no" so much during sex stems from the Yamato Nadeshiko virtues (i.e.: what they believe the true virtues of a woman should be). One of the virtues being vulnerability, which leads to women saying "no."